title: Inhibition of purine nucleoside phosphorylase by 8-aminoguanosine: selective toxicity for T lymphoblasts.
abstract: The guanosine analog 8-aminoguanosine is an effective inhibitor of the purine degradative enzyme purine nucleoside phosphorylase, both in vitro and in intact lymphoid cells. In a human lymphoblast tissue culture system, 8-aminoguanosine, in combination with low concentrations of 2'-deoxyguanosine, causes toxicity toward T cells but not B cells. The selective T cell toxicity correlates with increased accumulation of deoxyguanosine triphosphate in the treated T lymphoblasts.
mesh_terms: D001402:B-Lymphocytes / Q000201:enzymology; D002460:Cell Line; D003849:Deoxyguanosine / Q000494:pharmacology; D006151:Guanosine / Q000031:analogs & derivatives* / Q000494:pharmacology; D006801:Humans; D007700:Kinetics; D010430:Pentosyltransferases / Q000037:antagonists & inhibitors*; D011683:Purine-Nucleoside Phosphorylase / Q000037:antagonists & inhibitors*; D013601:T-Lymphocytes / Q000187:drug effects / Q000201:enzymology*
chemical_list: D006151:Guanosine; C032533:8-aminoguanosine; D010430:Pentosyltransferases; D011683:Purine-Nucleoside Phosphorylase; D003849:Deoxyguanosine